newdotnet issue help!!

HELLO I have the same problem I downloaded the unistaller from a different pc and ran it into the one with the problem it seems that has been uninstalled but since this happened my computer has been sending warnings about low virtual memory and it was fine before this, eventhough I uninstalled it the virtual memory problem is still present .

all this started when I was trying to set up the file share thing, also i lost my internet connection and dont know how to set it up again I use a pc card -wireless


help please!!